IADR Abstract Archives
Fatigue of CAD/CAM Ceramic Bridges with Machined Veneers
Objectives: Determine the failure load of all ceramic bridges with machined veneers and evaluate the effect of cyclic loading on the failure load.
Methods: Frameworks and veneers were milled using the CEREC inLab MC XL (Sirona, Germany) milling unit and cemented on aluminum dies using Multilink Automix resin cement (Ivoclar Vivadent). Experimental groups with N= 12 are: IPS e.max CAD veneer bonded to VITA In-Ceram zirconia framework; e.max CAD veneer bonded to VITA In-Ceram YZ framework; VITA Triluxe veneer bonded to VITA In-Ceram zirconia framework; VITA Triluxe veneer bonded to VITA In-Ceram YZ framework. Half of the specimens were randomly assigned for static failure load testing and half were subjected to cyclic loading at 30% of the mean static failure load of 1,009N, 935N, 674N, and 621N respectively for 100,000 cycles in a cyclic fatigue device (Boston University, Biomaterial research lab) and specimens were then tested using a universal testing machine (Instron 5566 A) at a crosshead speed of 0.5 mm/min. Statistical analysis using Tukey HSD tests at p ≤ 0.05.
Results: Failure Load of veneered bridges:
Please see the table below.
Conclusions: IPS e.max CAD/ VITA In-Ceram zirconia bridges had the highest values of failure load of all the bridges while VITA Triluxe/ VITA In-Ceram YZ bridges had the lowest values of failure loads.
Methods: Frameworks and veneers were milled using the CEREC inLab MC XL (Sirona, Germany) milling unit and cemented on aluminum dies using Multilink Automix resin cement (Ivoclar Vivadent). Experimental groups with N= 12 are: IPS e.max CAD veneer bonded to VITA In-Ceram zirconia framework; e.max CAD veneer bonded to VITA In-Ceram YZ framework; VITA Triluxe veneer bonded to VITA In-Ceram zirconia framework; VITA Triluxe veneer bonded to VITA In-Ceram YZ framework. Half of the specimens were randomly assigned for static failure load testing and half were subjected to cyclic loading at 30% of the mean static failure load of 1,009N, 935N, 674N, and 621N respectively for 100,000 cycles in a cyclic fatigue device (Boston University, Biomaterial research lab) and specimens were then tested using a universal testing machine (Instron 5566 A) at a crosshead speed of 0.5 mm/min. Statistical analysis using Tukey HSD tests at p ≤ 0.05.
Results: Failure Load of veneered bridges:
Please see the table below.
Conclusions: IPS e.max CAD/ VITA In-Ceram zirconia bridges had the highest values of failure load of all the bridges while VITA Triluxe/ VITA In-Ceram YZ bridges had the lowest values of failure loads.